Godox ML100Bi 100W Bi-Color LED COB Light - Lab Test
- Marvin Kuhn
- Lab report , Lights
- April 22, 2026
Table of Contents
Godox ML100Bi - Technical Analysis
Anyone looking for a small bi-color COB light will quickly come across devices that sound almost too good to be true on paper. Compact, 100 watts, USB-C, V-mount, app control, and a flexible form factor for mobile use. The Godox ML100Bi is exactly that kind of product. But how much of that actually holds up in real-world use, and how clean does the light really behave when you look beyond marketing claims?
I tested the ML100Bi in a mixed workflow of video, small setups, and lab measurements. The light was provided by an Amazon seller, and the links in the description point to that seller’s offers. My assessment is still my own and based on my measured data and practical use.
My first impression: the ML100Bi is not the most rugged light in its class, but it is one of the more interesting options when it comes to flexibility, size, and real-world usefulness.
Key Specifications
| Parameter | P3200 | D55 | D65 |
|---|---|---|---|
| Measured Color Temperature | 3259 K | 5705 K | 6785 K |
| MK-1 | 5.66 | 6.53 | 6.46 |
| DUV | -0.0027 | -0.0027 | +0.0005 |
| TM-30 Rf/Rg | 95/103 | 93/104 | 93/102 |
| SSI | 82 | 73 | 69 |
| CRI (Ra) | 97.70 | 95.70 | 94.60 |
| R9 (Red Rendering) | 97.00 | 96.00 | 91.00 |
| CRI (Re) | 96.93 | 94.47 | 92.93 |
| Lux without Reflector, 100% | 3718.26 | 4287.93 | 4202.41 |
| Lux without Reflector, 10% | 510.37 | 578.56 | - |
| Lux with Reflector | - | 19500 | - |
| EV Unmodified | 10.4 EV | - | 10.7 EV |
| Lux Standard Deviation | 307.20 | 307.20 | 307.20 |
Strengths
Very compact and mobile
-> The ML100Bi is small enough for quick setups and mobile work. For creators, solo operators, or small teams, this form factor is a real advantage.
Flexible power options
-> DC, 14.8V V-mount, or USB-C: the light adapts to the setup. If you work on location, you can run it lean; in the studio, you benefit from auto-on.
TM-30 and SSI are overall usable for real setups
-> Rf stays solid and Rg is slightly elevated, so the light appears natural to slightly saturated. SSI is strongest at 3200K and drops toward daylight, which matters for matching.
CRI remains at a good level (secondary weighting)
-> Ra, R9, and Re remain strong and confirm a solid baseline, but for my evaluation they are less decisive than TM-30 and SSI.
Solid output for its size
-> Unmodified and with suitable modifiers, the light output is good enough for interviews, smaller productions, and content setups.
Weaknesses
Not perfectly aligned on the CCT display
-> Measured values are slightly above the set color temperatures. In practice, that can make the light look a bit cooler than expected, especially in the daylight range.
SSI drop in the daylight range
-> The drop from SSI 82 to 73 and 69 makes matching with other fixtures more demanding at higher CCT values.
No true brightness consistency mode across CCT
-> Brightness is not fully constant across all CCT values. A consistency mode would help keep output more stable when changing color temperature. In direct comparison, Nanlite performs better in this area.
Beam character depends on the modifier
-> The double Fresnel adds more punch, but also creates a visible hotspot. With diffusion, the light looks nicer, but less intense.
Plastic used for bracket and mount
-> Fine for light portable setups, but a limit for heavy or large modifiers.
Practical Use
Suitable for
-> Content creation and YouTube setups
-> Interviews and small studio productions
-> Mobile key-light or fill-light setups
-> Open-shade shoots and compact on-location workflows
Less suitable for
-> Heavy modifiers
-> Setups requiring maximum mechanical robustness
-> Mixed-light situations where extremely precise matching is required
Conclusion
The Godox ML100Bi is a flexible 100W COB light for creators, small productions, and mobile setups. It stands out with its compact form factor, strong power flexibility, and overall usable color rendering. The measurements also clearly show that brightness is not fully constant across CCT values, where Nanlite is currently better positioned.
For the final assessment, I prioritize TM-30 and SSI for this light. That is exactly where the pattern becomes clear: warm light works very well, while in the daylight range you need more effort for matching and correction.
In day-to-day work, this is not a deal-breaker, but you should know what to expect: the ML100Bi is a practical tool with clear strengths and equally clear limits. If this specific mix is what you are looking for, it is a very usable overall package.
Data Overview
The complete lab PDFs and charts will be added here once the final files are in the review folder.
TM-30-18
TM-30 Multi Report
TM-30 Comparison
Multiple measurements in direct comparison
Report selection by CCT
All loaded reports are sorted by CCT automatically. The slider snaps to the nearest report.
Color Vector Graphic
Reference and test as closed 16-bin curves.
Normalized Spectral Power Distribution
TM-30 Dashboard
Local shifts and radial visualization as in the standard report.
Local Chroma Shift (Rcs,hj)
Local Hue Shift (Rhs,hj)
Local Color Fidelity (Rf,hj)
Color Sample Fidelity (Rf,CESi)
Direct overview of all 99 CES samples with fidelity values.
Measure Comparisons
Additional comparison view analogous to the TM-30 reference representation.
Color Evaluation Samples
Highlighted skin-tone areas provide practical orientation for portrait colors. Click to zoom.
Chart
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Disclaimer
This product was provided by an Amazon seller. However, providing the product had no influence on my opinion or product evaluation. I tested the light independently and shared my honest opinion. These links are not affiliate links, according to our current understanding. They might be tracked by the Seller, but I do not receive any commission or compensation for purchases made through these links. The links are provided for convenience and to help readers find the product if they are interested. Always check the product details and seller information before making a purchase. Sponsored link US1 Sponsored link US2 Sponsored link UK
